+(defcustom message-default-mail-headers
+ ;; Ease the transition from mail-mode to message-mode. See bugs#4431, 5555.
+ (concat (if (and (boundp 'mail-default-reply-to)
+ (stringp mail-default-reply-to))
+ (format "Reply-to: %s\n" mail-default-reply-to))
+ (if (and (boundp 'mail-self-blind)
+ mail-self-blind)
+ (format "BCC: %s\n" user-mail-address))
+ (if (and (boundp 'mail-archive-file-name)
+ (stringp mail-archive-file-name))
+ (format "FCC: %s\n" mail-archive-file-name))
+ ;; Use the value of `mail-default-headers' if available.
+ ;; Note: as for Emacs 21, XEmacs 21.4 and 21.5, it is
+ ;; unavailable unless sendmail.el is loaded.
+ (if (boundp 'mail-default-headers)
+ mail-default-headers))